Method of delivering molten glass to molds.



L'. w. PROEGER METHOD 0F DELIVERING NIOLTENGLASS T0 MOLDS.

, APPLICATION FILED JUNE I7, |914. Llm@ Patented June 15, 1915.

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L. W.`PHOEGER.

METHOD 0F DEUVENG MOLTEN GLASS T0 MLDS.

l 4HPUCATION FILED JUNE 17| 1914 I l E lfm Patnted June 15, 1915.

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that@ i; llld PATlhlh METHOD OF DELVERING MOLTEN GLASS TQ lVlOLllS.

Specification of Letters Patent.

1iaitcnted June t5, it

Application led .Tune 17, 1914. Serial No. 845,564.

To all whom it may concern:

Be it known that l. LUIS lV. Pnonona, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Methods of Delivering Molten Glass to Molds; and l do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to a method ot' cutting ofi' and delivering molten glass from the receptacle containing same, in measured qmintities to molds or other roc-r ptacles.

The object of the invention is to provide a method for the automatic discharge ot molten glass from the :furnace or other receptacle containing same, so that the glass will be delivered in measured quantities te. the mold.y by cutting ott the glass each time at the point of discharge, without chilling the glas and causing same to collect around the di` -.arge opening and thus prevent the proper How of the glass.

My invention consists, generally stated, in the method of discharging and cutting off molten glass from a glass delivering appa'- ratus. having a main upper outlet and lower outlet connected by a closed passage, consisting in collecting a quantity of glass in the said passage between said outlets, discharging said mass ot glass, elongating the glass troia the upper outlet to a portion narrower than the size ot said lower outlet, and cut- Aing oli' the glass at this' elongatedportion.

ln the accompanying drawings, I have illustrated a form ot apparatus suitable for carrying out my improved process, in which- Figure 1 is a sectional view of i; receptacle containing the molten glass, with the apparatus applied thereto, the parts being illustrate/d in the cutting-ott position; Fig. 2 is a horizontal section of the receptacle containing the molten glass, the cutting oli apparatus being shown in dotted lines; Fig. 3 is a plan view of the cutting-oil"apparatus, showing the parts open; nig. 4- is a crosssection showing the parts in cutting-off position; and Fig. 5 is a like view showing the shearing or cutting-off member withdrawn.

The apparatus which I have illustrated as suitable for carrying out my invention is one which forms the subJect matter of a separate application for Letters Patent ot the United States, iiled by me November 13, 1912, Serial No. 731,203.

lThe numeral 2 designates a suitable taut: Or furnace for melting tli'e glass and connected with said furnace is 'the receptacle B containing the molten glass which iows into said receptacle Yfrom the furnace Q. The receptacle 3 is provided with the discharge opening 5, the walls of said discharge opening being chiefly formed 'of the refractory material forming the bottom et said receptacle, said bottom, however, being provided with a reinforcing plate G with an opening T, registering withrthe discharge oliiening ot said receptacle. ln order to regulate the size of the discharge opening, 'I provide a plate S which is movable in a guide i) in the receptacle 3. This plate provided with the flange l0 through which the threaded bolt ll. passes, so that by turning o't said bolt, the plate S 'is moved to and 'tro to conn trol the size oi discharge opening Below the receptacle 3 is the supporting plate 12 which is carried by rods 125. rhis plate has the guide il, and a yoke member 15 is adapted to move back and forth in said guide. The yoke l5 has the links 'i6 pivotally connected thereto, and the outer ends of said links are pivotally secured to lugs 1T on the arms i8 or". the partiblc discharging member 19 formed in two halves, 2O and '131. The two parts when united form the opening 19a, which registers with the openings 5 and 7, so that the molten glass from the receptacle 3 can pass through the movable discharge member 1:2. The arms are mounted on stud 18, which is threaded into the plate l2. A lever 29 is adapted to open and close the halves of the discharge member 19, and the inner end oit' said 'lever is connected by the bolt Q3 to the yoke l5. The lever 2Q has the slot 24 which engages the pin 25 on the supporting'platc l2. lt is apparent that by moving the varm 22 the yoke l5 is moved in the guide 14C and through the links 1G, the. halves 2O and 2l are opened and closed. A cut-ott' or shearing member 27 is also mounted on the stud 1S, and said shearing member is operated bythe lever 28, which has the pin Q9 con. nected to the arm 30 of said shearing me1nber, and said1 pin 29 moves in slot 31 in the .supporting p ate 12. By operating the lever 2S, the shearing member is moved in and out of shearing position. Said partible discharge member 19 and the shearing member 27V form a closed extension or passage to the receptacle 3, ,and said extension contains J preferably a less quantity of glass than that re uiged for the article to be formed.

n carrying out my improved method by the above apparatus, the receptacle 32 to receive the molten glass is brought into proper position, whereupon the arm 28 is operated to withdraw the shearing member 27. lVhere apparatus like that illustrated is employed, immediately following the withdrawal of the shearing member 27, the halves of the discharge member are separated by operation of the lever 22, permitting the molten glass to drop in a mass from said extension into the receptacle or mold 32, and this mass, connected with the glass contained within the receptacle 32 is followed up by said molten glass, which elongates as it flows downwardly into substantially the shape indicated in dotted lines Fig. l.

When the proper amount of glass has been delivered to the receptacle 32, the halves of the discharge member are closed .and immediately-following, the shearing member 27 is brought into a closed position, and, in its movement, acts to shear or cut oil the supply of molten glass. In this manner, the glass contained within the extension formed by the discharge member 19, and the cut-off member 27 is discharged into the mold or receptacle 32 below, and inaddition a portion of the glass is discharged through the discharge outlet 5 from the receptacle 3, until the amount of glass required to make the article has been delivered to the mold or other receptacle 32. By freeing the glass from the walls of the extension each time the glass is delivered to the mold, the glass is prevented from chilling or clogging up the discharge opening as the shearing member cuts r*off the glass at the outlet of the movable discharge member, and the glass at this point is elongated so as to be narrower than the outletzof the movable discharge member, so that in cutting olf the, glass, the knife does not cut a portion of the i glass of the saine dimensions as the discharge outlet. 'Ihe main point of the advan. tage in my improved method is the fact that the elongated portion of glass to be cut od by the knife is of smaller size than the outlet and at the sam'e time, after each operation the passage or extension isfclosed against exposure to the atmosphere, which reduces the l "fsio'f drops in a mass, followed by the hottersglass from the receptacle 3, which imiabilityl of the chilling of the l glass before it pa sses into the mold. In actual operation w en the knlfe is withdrawn,

mediately elongates and assumes a size at the movable discharge outlet of less size than said outlet, so that when the parts of the movable discharge member are closed and the knife brought around to cut olf the glass, the knife has only to out this narrow elongated portion and the chilling of the glass and clogging up of the discharge member are obviated. The glass is discharged in even and uniform quantities to the receptacle below, and the glass is in such plastic condition as to be distributed properly in the formation of the article.V

It is obvious that other forms of apparatus other than that illustrated may be employed for carrying out the above described method.

lVhat I claim is:

l. The method of discharging and cutting ol molten glass from a glass delivering receptacle having an upper outlet and a lower outlet connected. by a closed passage, consisting in collecting a mass of glass in said passage between said outlets, and discharging said mass of glass, elongating the" glass from the upper outlet to a portion nzi'rrower than the 'size of said lower outlet,

and cutting ofi' the glass at the lower outlet at such elongated portion.

.y 2. The method of discharging and cut- Iting 0H molten glass from a glass delivering f receptacle having an upper outlet and a lower outlet iconnected by a closed passage, consisting in collecting a mass of glass in said passage between said outlets, discharging said mass by freeing it from the walls of said passage, elongating the glass from the upper outlet to a portion smaller than the size of said lower outletfand cutting off the glass at the lower outlet at said elongated portion.

3. The method of discharging and cutting l off molten glass from a glass delivering receptacle, consisting in drawing olf from the main supply of molten glass a portion less f' than that required to form the article and confining said portion of glass while still unitedto the main supply, freeing said portion of glass"on all sides, thereby dropping said portion of glass together with an added portion from the main supply,

elongating the added portion, and cutting off the glass at such elongated portion.

In testimony whereof, I the said'LUis W. Pnonsnn have hereunto set my hand.4

LUIS W. PROEGER. 

